JSFiddle - React, Tailwind, and code Playground

HTML

<div id="images"></div>

CSS

#images { border:1px solid red; }

JavaScript

// This function will add an array of images to div#images
    function showImages(images) {
        var container = document.getElementById("images"); // get the #images div
        for( var i = 0, l = images.length ; i < l ; i++ ) {
            var img = document.createElement('IMG'); // create the IMG tag
            img.src = images[i].src; // set the src - the image should be preloaded when this happens
            container.appendChild(img); // add the IMG tag to the #images div
        }
    }
    
    // This one will create JS Image objects from an array of URLs
    function loadImages(urls) {
        var remaining = urls.length; // the images still waiting to be fetched
        var images = []; // empty array to hold the created Image objects
        
        // this function will be called for Image object that is loaded
        var onloadHandler = function() {
            remaining--; // decrement the number of remaining images
            if( remaining < 1 ) {
                showImages(images); // if all images have loaded, add them to the page
            }
        };
        
        // create an Image object for each URL
        for( var i = 0, l = urls.length ; i < l ; i++ ) {
            var img = new Image();
            img.onload = onloadHandler; // set the onload-handler before setting the src
            img.src = urls[i];
            images.push(img); // add the Image object to the images array
        }
    }
    
    window.onload = function() {
        var urls = [
            "http://desmond.imageshack.us/Himg391/scaled.php?server=391&filename=countdown.gif&res=medium",
            "http://icanhascheezburger.files.wordpress.com/2010/11/funny-pictures-gif-cat-love.gif",
            "http://i52.photobucket.com/albums/g9/cpchick/Random%20Gifs/therock.gif",
            "http://www.mobileapples.com/Assets/Content/Screensavers/dc_1owy86mw.gif",
            "http://www.pptbackgrounds.fsnet.co.uk/images/powerpoint-countdown-u1.GIF"
       ...